use xhex everywhere.

nip04/nip04.go

@@ -6,7 +6,6 @@ import (
 	"crypto/cipher"
 	"crypto/rand"
 	"encoding/base64"
-	"encoding/hex"
 	"fmt"
 	"strings"
 
@@ -23,7 +22,7 @@ func ComputeSharedSecret(pub nostr.PubKey, sk [32]byte) (sharedSecret []byte, er
 	// adding 02 to signal that this is a compressed public key (33 bytes)
 	pubKey, err := btcec.ParsePubKey(append([]byte{2}, pub[:]...))
 	if err != nil {
-		return nil, fmt.Errorf("error parsing receiver public key '%s': %w", "02"+hex.EncodeToString(pub[:]), err)
+		return nil, fmt.Errorf("error parsing receiver public key '%s': %w", "02"+nostr.HexEncodeToString(pub[:]), err)
 	}
 
 	return btcec.GenerateSharedSecret(privKey, pubKey), nil

nip04/nip04_test.go

@@ -1,7 +1,6 @@
 package nip04
 
 import (
-	"encoding/hex"
 	"strings"
 	"testing"
 
@@ -56,8 +55,8 @@ func TestEncryptionAndDecryptionWithMultipleLengths(t *testing.T) {
 }
 
 func TestNostrToolsCompatibility(t *testing.T) {
-	sk1, _ := hex.DecodeString("92996316beebf94171065a714cbf164d1f56d7ad9b35b329d9fc97535bf25352")
-	sk2, _ := hex.DecodeString("591c0c249adfb9346f8d37dfeed65725e2eea1d7a6e99fa503342f367138de84")
+	sk1, _ := nostr.HexDecodeString("92996316beebf94171065a714cbf164d1f56d7ad9b35b329d9fc97535bf25352")
+	sk2, _ := nostr.HexDecodeString("591c0c249adfb9346f8d37dfeed65725e2eea1d7a6e99fa503342f367138de84")
 	pk2 := nostr.GetPublicKey([32]byte(sk2))
 	shared, _ := ComputeSharedSecret(pk2, [32]byte(sk1))
 	ciphertext := "A+fRnU4aXS4kbTLfowqAww==?iv=QFYUrl5or/n/qamY79ze0A=="